gistfile1.txt

  var horizontalLines = (function() {

    var playing = false;
    var callback = _.identity;

    var distance = min_dimension * 0.5;

    var line = two.makeLine(-width, center.y - center.y * .25, 0, center.y - center.y * .25);
    var line2 = two.makeLine(width, center.y + center.y * .25, 2*width, center.y + center.y * .25);

    line.noFill().stroke = "#333";
    line.visible = true;

    line2.noFill().stroke = "#333";
    line2.visible = true;

    var start = function(onComplete, silent) {
      line.visible = true;
      playing = true;
      animate_in.start();
      animate_in2.start();
      if (_.isFunction(onComplete)) {
        callback = onComplete;
      }
    };

    start.onComplete = reset;

    var animate_in = new TWEEN.Tween(line.translation)
      .to({
        x: 2*width + width/2 
      }, duration * 0.7)
      .easing(Easing.Circular.In)
      .onComplete(function() {
        //animate_out.start();
        start.onComplete();
        callback();
      });

    var animate_in2 = new TWEEN.Tween(line2.translation)
      .to({
        x: -2*width + width/2 
      }, duration * 0.7)
      .easing(Easing.Circular.In)
      .onComplete(function() {
        //animate_out.start();
        start.onComplete();
        callback();
      });

    var animate_out = new TWEEN.Tween(line)
      .to({
        beginning: 1.0
      }, duration * 0.25)
      .easing(Easing.Circular.Out)
      .onComplete(function() {
        start.onComplete();
        callback();
      });

    var exports = {
      start: start,
      clear: reset,
      playing: function() { return playing; },
    };

    var a = {
      x: 0, y: 0
    };
    var b = {
      x: 0, y: 0
    };

    var rando, theta, pct, i, p;
    function reset() {

      playing = false;
      rando = Math.random();

      line.linewidth = Math.round(rando * 5) + 7;
      line2.linewidth = Math.round(rando * 5) + 7;
      line.translation.set(-width + width/2, line.translation.y); 
      line2.translation.set(width + width/2, line2.translation.y); 

      line.ending = line.beginning = 0;
      line.ending = 1;
      line.visible = true;
      line2.visible = true;

      animate_in.stop();
      animate_out.stop();
    }

    reset();

    return exports;

  })();